add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ata/sata_sil24.c
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@@ -1,20 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
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  *
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  * Copyright 2005  Tejun Heo
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  *
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  * Based on preview driver from Silicon Image.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License as published by the
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- * Free Software Foundation; either version 2, or (at your option) any
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- * later version.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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- *
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  */
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 #include <linux/kernel.h>
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@@ -1214,7 +1204,6 @@
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 	cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
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 	if (!cb)
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 		return -ENOMEM;
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-	memset(cb, 0, cb_size);
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 	pp->cmd_block = cb;
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 	pp->cmd_block_dma = cb_dma;
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@@ -1314,28 +1303,10 @@
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 	host->iomap = iomap;
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 	/* configure and activate the device */
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-	if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
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-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
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-		if (rc) {
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-			rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
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-			if (rc) {
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-				dev_err(&pdev->dev,
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-					"64-bit DMA enable failed\n");
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-				return rc;
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-			}
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-		}
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-	} else {
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-		rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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-		if (rc) {
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-			dev_err(&pdev->dev, "32-bit DMA enable failed\n");
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-			return rc;
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-		}
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-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
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-		if (rc) {
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-			dev_err(&pdev->dev,
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-				"32-bit consistent DMA enable failed\n");
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-			return rc;
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-		}
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+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
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+	if (rc) {
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+		dev_err(&pdev->dev, "DMA enable failed\n");
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+		return rc;
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 	}
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 	/* Set max read request size to 4096.  This slightly increases